APPINFO_PADDING

Normally, the AppInfo block includes a byte of padding at the end, to bring its length to an even number. However, some databases use this byte for data.

If your database uses the padding byte for data, then your &ParseAppInfoBlock method (see "SYNOPSIS") should call &parse_StdAppInfo with a true $nopadding argument.

If, for whatever reason, you wish to inherit &StdAppInfo::ParseAppInfoBlock, then add

    use constant APPINFO_PADDING => 0;

to your handler package, to tell it that the padding byte is really data.

seed_StdAppInfo

    &Palm::StdAppInfo::seed_StdAppInfo(\%appinfo);

Creates the standard fields in an existing AppInfo hash. Usually used to ensure that a newly-created AppInfo block contains an initialized category array:

        my $appinfo = {};
        &Palm::StdAppInfo::seed_StdAppInfo($appinfo);

Note: this is not a method.

newStdAppInfo

    $appinfo = Palm::StdAppInfo->newStdAppInfo;

Like "seed_StdAppInfo", but creates an AppInfo hash and returns a reference to it.

new

    $pdb = new Palm::StdAppInfo;

Create a new PDB, initialized with nothing but a standard AppInfo block.

There are very few reasons to use this, and even fewer good ones. If you're writing a helper class to parse some PDB format that contains a category list, then you should make that helper class a subclass of "Palm::StdAppInfo".

parse_StdAppInfo

    $len = &Palm::StdAppInfo::parse_StdAppInfo(\%appinfo, $data, $nopadding);

This function (this is not a method) is intended to be called from within a PDB helper class's "ParseAppInfoBlock" method.

"parse_StdAppInfo()" parses a standard AppInfo block from the raw data $data and fills in the fields in %appinfo. It returns the number of bytes parsed.

$nopadding is optional, and defaults to false. Normally, the AppInfo block includes a padding byte at the end. If $nopadding is true, then &parse_StdAppInfo assumes that the padding byte is application data, and includes it in $appinfo{'other'}, so that the caller can parse it.

ParseAppInfoBlock

    $pdb = new Palm::StdAppInfo;
    $pdb->ParseAppInfoBlock($data);

If your application's AppInfo block contains standard category support and nothing else, you may choose to just inherit this method instead of writing your own "ParseAppInfoBlock" method. Otherwise, see the example in "SYNOPSIS".

pack_StdAppInfo

    $data = &Palm::StdAppInfo::pack_StdAppInfo(\%appinfo);

This function (this is not a method) is intended to be called from within a PDB helper class's "PackAppInfoBlock" method.

"pack_StdAppInfo" takes an AppInfo hash and packs it as a string of raw data that can be written to a PDB.

Note that if you're using this inside a helper class's "PackAppInfoBlock" method, you should make sure that $appinfo{other} is properly initialized before you call &Palm::StdAppInfo::pack_StdAppInfo.

$nopadding is optional, and defaults to false. Normally, the AppInfo block includes a byte of padding at the end. If $nopadding is true, then &pack_StdAppInfo doesn't include this byte of padding, so that the application can use it.

PackAppInfoBlock

    $pdb = new Palm::StdAppInfo;
    $data = $pdb->PackAppInfoBlock();

If your application's AppInfo block contains standard category support and nothing else, you may choose to just inherit this method instead of writing your own "PackAppInfoBlock" method. Otherwise, see the example in "SYNOPSIS".

addCategory

    $pdb->addCategory($name [, $id [, $renamed]]);

Adds a category to $pdb.

The $name argument specifies the new category's name.

The optional $id argument specifies the new category's numeric ID; if omitted or undefined, &addCategory will pick one.

The optional $renamed argument is a boolean value indicating whether the new category should be marked as having been modified. This defaults to true since, conceptually, &addCategory doesn't really add a category: it finds one whose name happens to be empty, and renames it.

Returns a true value if successful, false otherwise. In case of failure, &addCategory sets $Palm::StdAppInfo::error to an error message.

deleteCategory

    $pdb->deleteCategory($name);

Deletes the category with name $name. Actually, though, it doesn't delete the category: it just changes its name to the empty string, and marks the category as renamed.

renameCategory

    $pdb->renameCategory($oldname, $newname);

Renames the category named $oldname to $newname.

If successful, returns a true value. If there is no category named $oldname, returns a false value and sets $Palm::StdAppInfo::error to an error message.